1) Added static method to GenLib class to produce a QStringList
   containing the Gnu Public licence which can be placed in a bash shell file.
2) Changed the clearFirewall.sh bash script generated by the Install class to
   delete any qiptables chains used to identify the ruleset in place. The
   chains are identified by prefixing the chain name with "Q_".

   Eg. "Chain Q_TEST (0 references)"